Bone-reducer



(No Model.) 2 Sheets8heet 1.

P. W. ANDREE.

BONE REDUGER. No. 348,946.- Patented se t. 14, 1886.

1 v I))V:JJM W V MwQ tS eei W/cmJ 0 We %17/ (4% J%r/Cg;

r amt e mm 2 Sheets-Sheet 2.

(No Model.)

P. W. ANDRBE.

BONE REDUGBR.

t. 14, 1886. :g Y

Pateng edgs m Ma N. PETERS. Pboio-Lilhomphor, Walhington. n. r;

UNTTED STATES PATENT GEEICE.

FRANZ \VILHELM ANDREE, OF CHICAGO, ILLINOIS.

BONE-REDUCER.

UPECIPICATIONEQrming part of Letters Patent No. 348,946, dated September14, 1886.

Application filed January 30, 1884.

Renewed July 21, 1886. Serial l\'o. 203,655. (No model.)

To all 1071 0122, it may concern.-

Be it known that I, FRANZ WILI-IELM AND'REE, a citizen of the UnitedStates of America, residing at Chicago, in the county of Cook and Stateof Illinois, have invented cer.- tain new and useful Improvements inBone Reducers, of which the following is a specification, referencebeing had therein to the accompanying drawings- My invention relates toan improved apparatus for reducing bones.

The object of the invention is to obtain a simple and effectiveapparatus for the purpose named and to that end it consists of the novelconstruction and combination of parts, as will be described and claimed.

Reference is made to the accompanying drawings, in which Figure 1. is aView in perspective of the apparatus complete; Fig. 2, a centralvertical section of Fig. 1; Fig. 3, a section on line 2 2 of Fi 2, andFig. 4 a face view of plate E.

Like letters refer to like parts in each view.

A represents the base of the apparatus, upon which the operative partsare mounted.

Upon the upper part of the casing there is mounted afeed-hopper,13, intowhich the unreduced bones are fed. Upon being fed into hopper I5 thebones fall between reducingrolls 0 0, provided with diamond-shaped teetha, as shown, iuclosed within the casing B and mounted as now described.Roll 0 is mounted on a shaft, a, to which is keyed a pulley, D, throughwhich motion is imparted to said shaft and roll.

Keyed upon shaft a is a cog, b, which in its revolution meshes with acog, c, keyed to a shaft, (1, upon which the roll G is mounted. Cogb issmaller than cog 0, and consequently roll 0 is revolved at a greaterspeed than is roll 0, whereby, in addition to crushing the bones, theserolls serve to tear them apart. In practice I have found it desirable torotate roll 0 at about four times the speed .of roll 0, although it willbe understood that their relative speeds may be varied. Upon passingrolls O G the part] y-reduccd bones are dis charged down an inclinedchute, D, formed with the casing, and are fed to the red ucingplates EE, now to be described. Plate E is a circular plate, secured by suitablemeans,

as shown in Fig. 3, to a partition, 0, formed on the interior of thecasing, and forming one of the walls of the chute D. Plate E is providedwith unbroken rows of teeth f, arranged parallel on the face of theplate from about its center outwardly to its periphery, and said plateis provided at its center with an opening, through which thepartially-reduced bones are fed to plate E. This last-named plate, whichis also circular in form, is keyed to a shaft, E, which has suitablehearings in the casing of the apparatus, and to one end of which iskeyed a pulley, G, through the medium of which motion is imparted tosaid shaft and plate. This plate is provided. with rows of teeth 9,which, in conjunction with those of stationary plate E, serve to reducethe bones to the desired fineness. The rows of teeth 9, with which plateE is provided, instead of forming continuous circles around the face ofsaid plate, are at intervals broken to form spaces 71 as shown in Fig.2. As the center of the plate is moved, the spaces above-described areenlarged to form spaces It, as shown in the same figure. The oppositeend of shaft F from that to which pulley G is keyed-has bearing in ablock, H, which is screw-threaded on its interior. Block H is screwedonto a screw-threaded extension of the casing, and carries a hand-wheel,1, and a ratehet,j, as shown in Fig. 3.

Passed through an opening in block H is a pin, K, the innerend of whichentersagroove, formed on shaft F, and prevents such shaft from movingendwise, except when the block H is moved. A pawl, I, mounted upon thecasing, engages with the ratchet j, described as forming part of blockH. By the arrange ment of the parts last described the plate E can beadjusted nearer to or farther from the plate E as it is desired toproduce finer or coarser reduced bones, by simply turning the hand-wheelof block H in the proper direction. A guide, on, may be arranged tocover the cog c, if desired, and the casing of the apparatus may be madein as many parts as desired, all suitably joined and held together inthe best manner; but these details being of minor importance need not bemore fully described.

The operation of the apparatus is as follows: The plate E being adjustedwith re spect to the plate E by the means described,

the bones are fed to the fast and slow crushing-rolls O O and pass fromthem in a par tially-reduced state to the plates E E. Thepartially-reduced bones are first fed to the spaces h of the plate E,and being carried around are further reduced. Upon being brought to asufficientdegree of fineness they enter into spaces h, and are graduallyreduced between the plates E ,E, until they are suffi- 1o ciently fineto escape therefrom, after which they are discharged into any tacle.

\Vhat I claim is The combination, with the stationary plate suitablerecep-

